Automobile exhaust shroud



L. A. KOCH, JR

AUTOMOBILE EXHAUST SHROUD Feb. 18, 1941.

Filed Spt. 8, 1936 a b D 1 .EJ. ml

INII/ENTOR. 4K0 cfi llllllllllllll lln A TTORNEY,

:55- rear of an automobile, while Patented Feb. 18, 1941 PATENT orricja''AUTOMOBILE EXHAUST SHROUD Louis A. Koch, Jr., Louisville, Ky.

Application September 8, 1936, Serial No. 99,896

8 Claims.

My invention pertains to specific structures of automobile exhaustextensions or shrouds.

Since the pipe which conducts the hot exhaust gasesfrom internalcombustion engines to the rear of automobiles for expulsion soon becomesrusty and unsightly from being subjected to extreme temperatures and theelements, brnamented exhaust extensions have been evolved to conceal theexposed discharge end of the pipe and to direct the gases with entrainedcarbon particles 50 as to prevent marring the exquisite finish of themodern automobile. In the beginning these devices were made of basemetals which soon rusted, then enamels and nickel plate were applied anddiscarded asincompetent. This was followed by chromium plate andstainless steel together with a reflector element, sometimes referred toas a jewel. or reflex unit. The latter were applied by conventionalmethods such as a bezel and screw or prongswhich entailed perforatingthe outer surface of the terminus or shell like portion of the shroudfor receiving the screw or prongs. These perforations, even thoughapparently closed by the screw or prongs, provided a passage for the hotgases to the exposed highly finished surface. This resulted in damagingthe embellished surfaces and the reflex unit. Therefore the main objectof this invention is to provide permanence for the embellishingelements. A further object lies in providing means to accomplish thisdesirable result without materially affecting the cost of production andthereby provide the' public with an enduring exhaust ex- 35 tension atthe same established or popular price. With the'foregoing and otherobjects, which will be revealed as the description of the details of thestructure proceeds and hereinafter claimed, it must be understood thatchanges from 40 the selected embodiment of my invention can be madewithout departing from the scope of my invention.

Preferred embodiments of my invention have been illustrated in theaccompanying drawing in which-- Figure 1 is a plan view of my automobileex-. haust shroud.

Fig. 2 is a side elevation of Fig. 1 shown partially in section. 1

.Fig. 3 is an and elevation of Fig. 1.

/ fashioned to telescopically embrace conventional exhaust pipe the endof a la represents sub- Reference numeral l indicates a tubular sleeveterminating at the stantially parallel juxtapositioned tongues extendingfrom said sleeve and perforated to receive bolts b, all of which areorganized for secure attachment to said pipe. I

Numeral ll indicates a projecting flared shell- 5 like body of steel,open at the bottom and referred to herein as a terminus. The primaryfunction of this body is'to rearwardly convey and downwardly direct theexhaust gases which frequently reach a temperature of 875 F., while 10the secondary function is to obscure the rusty exposed surface of theexhaust pipe. Superposed on and spaced from the terminus is a stainlesssteel covering or veneer indicated by numeral 2 secured thereon byclinched tongues 2a or their equivalent. Between the terminus and veneeris disposed an insulating medium 3 provided to prevent the heat frombeing transmitted to the veneer, thereby protecting it fromdiscoloration. It has been found that shrouds made of standard chromenickel stainless steel will yield to the encountered heat by developingI a straw color. To make the shroud entirely of. stainless steel resultsin a prohibitive price. The incident invention contemplates using commonlow priced sheet steel for the portion of the shroud indicated bynumerals l and II, superior stainless steel or other highly finishedmetal for the exposed veneer 2 and then protecting it againstdiscolorationby insulating as adverted to supra. This procedureeliminates the expense of. applying chrome or other expensive plating tothe entire exhaust extension and substitutes therefor an inexpensive,sheet metal stamping which can be of base material having the exposedsurface of the veneer highly finished and protected by insulation.

The veneer can be perforated to receive reflex unit J. It will be notedthat the jewel is also so located that it will be protected from theheat and gases and that there are no perforations extending through theterminus body which have been found to provide a passage for heat andthe exhaust gases.

It will thus be perceived that the objects of this invention as advertedto at the outset can be' realized by practicing the teachings disclosedherein.

I claim:

1. An extension for a motor vehicle exhaust pipe comprising a tubularsleeve portion, and remote thereto a terminus to direct exhaust gasesfrom said pipe, the outer surface of said terminus being equipped with aveneer which embraces a portion of a reflector body.

2. An extension for a motor vehicle exhaust pipe comprising a. tubularsleeve portion, and remote thereto a terminus to direct exhaust gasesfrom said pipe, the outer surface of said terminus being equipped with aveneer and provided with means for insulating said veneer from the heatof said exhaust gases.

3. An extension for a motor vehicle exhaust pipe comprising a tubularsleeve portion, and remote thereto 9. terminus to direct exhaust gasesfrom said pipe, the outer surface of said terminus being equipped with aveneer and means for utilizing said veneer to support a reflector bodyon said terminus.

4. An extension for a motor vehicle exhaust pipe comprising a tubularsleeve portion, and remote thereto an imperforate terminus to directexhaust gases from said pipe, the outer surface of said terminusbeingequipped with a veneer 6. A tail pipe spout comprising an inner wallstructure, an outer wall structure thermally insulated from the innerwall structure, said outer wall structure extending ove and concealingthe inner wall structure and providing a decorative covering therefor,and means for securing the said structures to a. tail pipe in suchposltion that exhaust gases from said pipe will be discharged againstsaid inner wall. 7

'7. A tail pipe spout comprising an inner wall structure, an outer wallstructure spaced from the inner wall structure, a solid material of lowheat conductivity in the said space, said outer wall structure extendingover and concealing the inner wall structure and providing a decorativecovering therefor, and means for securing the said structures to a tailpipe in such position that exhaust gases from said pipe will bedischarged against said inner wall.

8. A tail pipe spout comprising an inner wall structure adapted toextend beyond the tail pipe and having a cut-away portion to deflect thedischarged gases, an outer wall structure thermally insulated from saidinner wall structure and extending over and concealing the said innerwall structure to provide a decorative covering therefor, and means forsecuring the spout to the tail pipe.

LOUIS A. KOCH, JR.

